COMPONENTS

Iso-SleeveTM Cartridge Seal

ROTOR SLEEVEprevents oil leakage

about the shaft

RETAINER RINGlocks cartridge

assembly together

BASE RING ASSEMBLYholds seal components

together

BREAKDOWN SEAL increases the seal length to prevent oil

from being discharged under pressure

BREAKDOWN SEAL KEY

locks the breakdown seal in place

OIL DISTRIBUTORsupplies oil to the seal

WAVE SPRING AND GAS SIDE SEALprovides axial

pressure against stationary

components

O-RING reduces oil

leakage

GAS SEAL RINGseparates

contaminated oil

LABYRINTH SEALreduces gas

leakage

The Iso-sleeve cartridge seal is designed for high-pressure applications (maximum 4200 psig), where no gas leak-age can be tolerated. The cartridge design reduces the time and complexity of installation and maintenance. De-sign features include a PEEK (polyether ether ketone) thermoplastic rub-tolerant labyrinth seal for improved chemi-cal resistance and a gold babbitt coating on the breakdown seal and gas side seal for improved resistance to harsh sulfides and chlorides in gases.

Pressurized sealing oil is fed through the seal-oil inlet, where a portion of the oil is reduced to atmospheric pres-sure by a series of floating gold plated breakdown seals. This oil is returned to the clean reservoir. The remainder of the oil is forced through the gas side seal, another gold plated floating steel ring. This oil is discharged through the contaminated oil drain, to be reclaimed or discarded.

Features � Tungsten carbide coating on the rotor sleeve to minimize wear

� Gold babbitt on the breakdown seal and gas side seal for added resistance to sulfides and chlorides

� Rub-tolerant labyrinth inboard seal made of PEEK thermoplastic for reduced buffer gas consumption and chemical resistance

� Wedge windback groove on the gas side seal to minimize contaminated oil leakage

� Optimized bushing design for improved stability

Benefits � Replaceable seal sleeve (included with the cartridge) without opening the casing and removing the rotor

� Immune to dirt or liquids in the process gas � Allows monitoring of seal health with a sight glass and thermometer

� Provides positive damping to improve rotor dynamics � Designed to fit the existing Elliott compressor seal cavity – rotor modifications required

� Unnecessary to vent gas to flare (requires additional modifications)

© 2014 Elliott Group SVS.4056.1114

901 North Fourth StreetJeannette, PA 15644-1473Phone: 724-527-2811Fax: 724-600-8442Email: info@elliott-turbo.com

www.elliott-turbo.com

*Iso-Sleeve ™ Cartridge Seal STANDARD Retrofit Package includes the following: � Two (2) cartridge Iso-sleeve™ seals � One (1) set of assembly/disassembly tooling � One (1) rotor shaft machining � One (1) rotor balance � Standard Documentation Package: Revised outline drawings and updated assembly drawings and installation/removal instructions.

Application DescriptionIso-Carbon®

Cartridge Seal

Iso-Sleeve™ Cartridge

SealDry Gas

Natural GasGas cleanliness depends on where the gas is in its processing, upstream or midstream. There can be a wide range of pressures. Natural gas can be dirty and wet, but can be handled easily once purified.

3 3

Wet GasThe gas is typically dirty and close to its dew point; it can condense easily to a liquid state. Application pressures are very low. Oil seals are tolerant of dirty, hazardous gas since they use oil as a “buffer.”

3

Hydrogen RecycleThe gas is typically dirty and close to its dew point; it can easily condense to a liquid state. Application pressures range from moderate to high. Oil seals are tolerant of dirty, hazardous gas since they use oil as a “buffer.”

3 3*

Ethylene RefrigerationThis gas starts out as a liquid, but evaporates as it passes through an expansion valve. The vapors are then compressed for condensation. There are low inlet pressures and a high risk of product contamination. It is important to maintain a clean and oil-free process.

3

*Often requires a booster system for startup and/or additional gas conditioning as part of the buffer gas system.